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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<ul>
    <li id="l1">张三</li>
    <li>李四</li>
    <li>王五</li>
    <li><a href="" id="" class="a1">尚硅谷</a></li>
    <li><span>嘿嘿嘿</span></li>
</ul>

<a href="" title="a2">百度</a>

<p id="p1" class="p1">呵呵呵</p>
</body>
</html>